IMHE OpenIR  > 山地灾害与地表过程重点实验室
Experimental study on the development of collapse of overhanging layers of gully in Yuanmou Valley, China
Chen, Anqiang1; Zhang, Dan2; Peng, Hui3; Fan, Jianrong4; Xiong, Donghong4; Liu, Gangcai4
Corresponding AuthorLiu, Gangcai
2013
Source PublicationCATENA
ISSN0341-8162
EISSN1872-6887
Volume109Pages:177-185
SubtypeArticle
AbstractThe collapse of overhanging layers of the heads and sidewalls of gullies accelerates gully development. Thus, the development features of the collapse of overhanging layers must be understood. In this study, the process of collapse of overhanging layers in man-made soil bodies containing different soil layers was investigated by flow scouring experiments. A soil body composed of a lower sandy layer and an upper layer of clay soil was evaluated, and a field soil profile was modelled in a test tank with an open side. The results revealed that the occurrence of the collapse of overhanging layers could be attributed to the development of a scour hole in the open side; the greater the flow rate, the lower the proportion of on-wall runoff. On-wall runoff played a more important role in the development of scour holes than off-wall runoff. The shape of scour holes formed under different flow conditions was similar. Also, the scour hole is not apparently related to the flow rate, implicating that the collapse is more dependent on rainfall (runoff) time rather than rainfall (runoff) intensity in the studied region; this is substantially different from other soil erosion types that are closely related to rainfall intensity. Moreover, the maximum length (S-L) and height (S-H) of the scour holes increased gradually with accumulated flow and scouring time; in addition, the height of the hanging soil body (H-D) gradually decreased, and a linear relationship between SL and HD was observed (H-D = -0.359; S-L + 117.3; R-2 =0.861; P = 0.003). After the seventh scour test, the scour hole triggered the collapse of the upper clay layer. The cantilever model was modified to predict the stability of the overhanging soil body. It provided a satisfactory explanation of the static balance of the weight of the soil as well as the tensile strength. After the seventh scour test, the measured and predicted threshold values of H-D, S-L, and T-C were nearly equal, and a stable balance state was attained. However, when a 10 cm tension crack appeared in the overhanging soil body, a stable balance state was obtained during the sixth scour test. (C) 2013 Elsevier B.V. All rights reserved.
KeywordScour Hole Collapse Of Overhanging Layers Gully Head Dry Hot Valley
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.catena.2013.04.002
URL查看原文
WOS Subject ExtendedGeology ; Agriculture ; Water Resources
Indexed BySCI
WOS KeywordUPLAND CONCENTRATED FLOWS ; SCOUR DOWNSTREAM ; HEADCUT ADVANCE ; RAINFALL INTENSITY ; STRATIFIED SOILS ; EROSION ; MIGRATION ; PRESSURE ; OVERFALL ; STRESS
Language英语
Quartile3区
TOP
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000321729400018
Funding OrganizationFoundation of Key Laboratory of Mountain Hazards and Earth Surface Processes of CAS ; National Natural Science Foundation Committee of China(41071013) ; One Hundred Young Persons Project of the Institute of Mountain Hazards and Environment Chinese Academy of Sciences(SDSQB-2011-01)
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/8310
Collection山地灾害与地表过程重点实验室
山地表生过程与生态调控重点实验室
数字山地与遥感应用中心
Affiliation1.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, Kunming 650205, Peoples R China
2.Yunnan Agr Univ, Coll Resources & Environm, Kunming 650205, Peoples R China
3.Yunnan Acad Agr Sci, Res Inst Trop Ecoagr Sci, Yuanmou 651300, Peoples R China
4.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Chen, Anqiang,Zhang, Dan,Peng, Hui,et al. Experimental study on the development of collapse of overhanging layers of gully in Yuanmou Valley, China[J]. CATENA,2013,109:177-185.
APA Chen, Anqiang,Zhang, Dan,Peng, Hui,Fan, Jianrong,Xiong, Donghong,&Liu, Gangcai.(2013).Experimental study on the development of collapse of overhanging layers of gully in Yuanmou Valley, China.CATENA,109,177-185.
MLA Chen, Anqiang,et al."Experimental study on the development of collapse of overhanging layers of gully in Yuanmou Valley, China".CATENA 109(2013):177-185.
Files in This Item:
File Name/Size DocType Version Access License
刘刚才(通讯作者):Experiment(703KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, Anqiang]'s Articles
[Zhang, Dan]'s Articles
[Peng, Hui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, Anqiang]'s Articles
[Zhang, Dan]'s Articles
[Peng, Hui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, Anqiang]'s Articles
[Zhang, Dan]'s Articles
[Peng, Hui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 刘刚才(通讯作者):Experimental study on the development of collapse of overhanging layers of gully in Yuanmou Valley, China.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.